Probably close to or more than a new unit would cost.
3 LBS
Depends on the size of the unit and how bit or small the compressor is. There will be labels that will tell the technician how many pounds to capacity for Freon.
R134a OEM charge is 29oz or 0.74kg
100 bucks or so
I just had 2 pounds of Freon added to my central A/C and was charged $30 a pound.
1.58 lb ( 3.50 kg)
The exact amount of Freon that needs to be added to a Kia Optima is unknown. This is because if Freon is needed there may be a leak and the car will need to be taken to a mechanic.
Window AC units CANNOT be recharged at any reasonable expense. They normally hold about 8-14 onces.
Varies by vehicle usually 1-3 lbs.
1lb 6oz is all u need
You need to charge to the correct PSI level. You can find a chart on the website linked below.
It varies per contractor. They usually charge for their labor and disposal fee.